Gap Domain Wall Fermions

Details Gap Domain Wall Fermions Gap Domain Wall Fermions

2006-06-22

arxiv.org/abs/hep-lat/0606014v2

Phys.Rev.D74:034512,2006

Physics

High Energy Physics

High Energy Physics - Lattice

12 pages of text, 14 figures, added sect.6 on topology and references

Scientific paper

10.1103/PhysRevD.74.034512

I demonstrate that the chiral properties of Domain Wall Fermions (DWF) in the large to intermediate lattice spacing regime of QCD, 1 to 2 GeV, are significantly improved by adding to the action two standard Wilson fermions with supercritical mass equal to the negative DWF five dimensional mass. Using quenched DWF simulations I show that the eigenvalue spectrum of the transfer matrix Hamiltonian develops a substantial gap and that the residual mass decreases appreciatively. Furthermore, I confirm that topology changing remains active and that the hadron spectrum of the added Wilson fermions is above the lattice cutoff and therefore is irrelevant. I argue that this result should also hold for dynamical DWF and furthermore that it should improve the chiral properties of related fermion methods.

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